Opthalmic mounting.



J. N. NELSON. OPHTHALMIC MOUNTING. APPLICATION FILED NOV. 30. 1917.,

Patented Apr. 23,1918.

, new "and useful Improvementsin Ophthah mic Mountings, of wh ch the .follow ng s a Jennie. raise "orn'ocnnsrnitnnw was; Jessie-libero In. KIR's'rnin sorts i 'oont'rnn'r, or noonns'rnnynnw YORK, 'Acon-PonArIon;

OPHTHALMIC moun'rrneq 91 I Specificationof Letters Patent.

[Patented Apr. as 191%.

application filedlvovernberw, 191a. seri inaaoaeoo. y

subject oitliejKing of Sweden, and resident of Rochester, in the county of Monroeand State of New York, e have invented certain specification.

The present invention relates to ophthal-i' mic mountings; and more particularly to the type in which the lenses areconnectejdbya substantially rigid b idge 1 or support, a and a. pair of nose guards are pivotally mounted; on the support and held toward the nose under the action of springs: the nose guards.

havinglorwardly extending finger pieces by which thenose engaging portions of the guards. are moved away from each other against the actionof the springs. An object of this invention is to provide an improved construction whereby the guards may be re moved from the support for the lenses without removing the pivot pins on whlch the guards are mountedto turn, this removal being effected without the provlslon of any separate parts on the mounting.

To this and other ends the invention consists of certain parts and combinations of parts all of which will be hereinafter de scribed, the novel features being pointed out in the ppended claims. 1

In the drawings Figure 1 is a plan view of amounting constructed in accordance with the present invention;

Fig. 2 is atransverse section through the mounting inthe plane of one of the pivot pins; i

Fig. 3-is a perspective of a portion of one of the guardlevers; l 4; is an enlarged sectional view of another embodiment of the invention; and

ings, "A indicates the lenses which are connected bythe support comprising, in this instance, the bridging portion 1 connected to-the lens attaching devices 2 by'connecting portions or tables 3. (Mounted to swing on the connecting portions 3 of the support are the guard lever l having the forwardly extending. finger pieces 5 at their forward ends andthe nose bearing portions 6 at their rear ends. Pivotal connection between each Fig.5 is a perspective view of the pivot the pivot pin.

A i p H offtheguards is, in this in Be 'it -l now11"t11atl, JonN N. Nn1.soN, a

vijdedwith a, per ora i n throughwhich a 1 reduced portion. on the pivot pin passes, the j-lower. end of thepivot pin. being upset at StonQthe under side of the supp0rt,';wh11e he shoulder 9 between the reduced portion 7 and the bearing; portion-8 engages the, y upper s de of. thesupport, The pivot pin is:

turning yet," if a screwdriver be connected to the lupper end thereof through, the reces's' 10, the pivot pin may be turned. -111 portion 3 fthe support to more readily facilitatethe turning of the pivotpin in the support 7 l i V 7 The purposeof turningthis pivot pin is to permit the lateral projection 12 on the free end of the pivot pin to be brought into alincment with the slot or recess 13 formed in the bearing portion of the guard lever, so that, when the projection 12 andthe recess .sosecured to the support-that, while under j ordinary conditions it will be held against l the embodiment shown in Fig: 4 a spring washer 11 is interposed between the upset end 8 of the plvot pin and the connecting are alined, the guard lever may be fitted to or removed from the bearing portion 8 of the pivot pin. In the illustrated embodiment the guard lever has a tubular portion 13 proectlllg from the upper side thereof and formed with a rib or shoulder 14 at its upper end. The coil spring 15 surrounds the tubular portion 13 and has oneend 16 secured to the guard lever while the other end 17 bears against the support for the lenses.

With this arrangement the spring i carried by the guard lever and may be removed from or fitted to the mounting with such guard lever. The tubular portion also provides an extended bearing for the guard leverand prevents'wabbling of the latter on It will be apparent guard lever, or fit the same to the mounting, the pivot pin is turned relatively to the sup port for the lenses, untilthe projection 12 is alined with the slot 13", after which the movement of the guard lever axially on or off the pivot pin will be permitted. a After that to remove" i V theguard lever is placed on the'pivot; pin,'11o

the latter is then turned to' bring thelpro I jje'etion 12abovefthe upper endof, the tuand lso' on the;.pivot,p in isobviated, and,

bular "portion 13 ,thgguara lever in place.

-' With this arrangement the formation of screw threads in the support for the lenses 1 at the's'aine time, the ".pivot pin is maintained permanently in connection "With-the support gu rd, 'is' eliminate'di z NVhat I Claim as my-invention and'desire *tose'cu're byL'etters Pateiit is: V

V {An ophthalmic -1fn mnt ing comprising a srrpp'ort forthe lenses, afnose uard and ip'lvot na11ch0 ed andfrotata 'le in "one of said parts, 'a nd havinga hearing, in the other part Y to'{ permit a "free turning inovev ment between 's'ueh 'othe1- part and the pivot "pin, the pivot pinand such other part hav- 1ng provisi1on"-for, p'er-li'l'itting"the "said other I part fbeingdiseonneetedfrom the pivot pin from .theipart in which pin is anehored.

ophthahmem untingcompri in a- \vlienthe flatter is turned in hut'jn'otv removed as: this pat t aday'be omamed risr five ee'nts each; by Washington-no.

support for the lenses, a nose guard, and a pivot pin anehared and rotatable inone of said parts andhavinga bearing in the other part to permit a free turning between such other part and the pivot pin, the said other part being provided with a lateral slot in its bearing part and the pivot pin having a projection adapted to pass through said slot on a relative axial movement between the pivot pin and the said other part, said projection being arranged to be engaged with or disengaged from said other parton therotation of the pivot pin in the part in which the pin is anchored.

An ophthalmic"mounting comprising a support for the lenses, a pivot pin anehored'in and rotatable in the support, said pivot pin having a bearing portion and a lateral projection atthe end of the bearing portion, a nose guard mounted to turn on the. pivot pin and having a lateral. slot in its bearing through which the lateral projection of the pivot pin is adapted to pass in order to permit the nose guard to be fitted to or to be removed from the mounting.

JOHN N. NELSON.

addressing the Commissioner of latents, 

